56538478 has 4 divisors (see below), whose sum is σ = 84807720. Its totient is φ = 28269238.

The previous prime is 56538463. The next prime is 56538511. The reversal of 56538478 is 87483565.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14134618 + ... + 14134621.

It is an arithmetic number, because the mean of its divisors is an integer number (21201930).

Almost surely, 2^56538478 is an apocalyptic number.

56538478 is a deficient number, since it is larger than the sum of its proper divisors (28269242).

56538478 is a wasteful number, since it uses less digits than its factorization.

56538478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28269241.

The product of its digits is 806400, while the sum is 46.

The square root of 56538478 is about 7519.2072720467. The cubic root of 56538478 is about 383.8086023531.

The spelling of 56538478 in words is "fifty-six million, five hundred thirty-eight thousand, four hundred seventy-eight".